Book Image

iOS 16 Programming for Beginners - Seventh Edition

By : Ahmad Sahar, Craig Clayton
Book Image

iOS 16 Programming for Beginners - Seventh Edition

By: Ahmad Sahar, Craig Clayton

Overview of this book

With almost 2 million apps on the App Store, iOS mobile apps continue to be incredibly popular. Anyone can reach millions of customers around the world by publishing their apps on the App Store, which means that competent iOS developers are in high demand. iOS 16 Programming for Beginners, Seventh Edition, is a comprehensive introduction for those who are new to iOS, covering the entire process of learning the Swift language, writing your own app, and publishing it on the App Store. This book follows a hands-on approach. With step-by-step tutorials to real-life examples and easy-to-understand explanations of complicated topics, each chapter will help you learn and practice the Swift language to build your apps and introduce exciting new technologies to incorporate into your apps. You'll learn how to publish iOS apps and work with new iOS 16 features such as Mac Catalyst, SwiftUI, Lock Screen widgets, WeatherKit, and much more. By the end of this iOS development book, you'll have the knowledge and skills to write and publish interesting apps, and more importantly, to use the online resources available to enhance your app development journey.
Table of Contents (34 chapters)
1
Part I: Swift
11
Part II: Design
16
Part III: Code
26
Part IV: Features
32
Other Books You May Enjoy
33
Index

Exploring operators

You can perform arithmetic, comparison, and logical operations in Swift. Arithmetic operators are for common mathematical operations. Comparison and logical operators check an expression's value and return true or false.

Important Information

For more information on operators, visit https://docs.swift.org/swift-book/LanguageGuide/BasicOperators.html.

Let's look at each operator type in more detail. You'll start with arithmetic operators (addition, subtraction, multiplication, and division) in the next section.

Using arithmetic operators

You can perform mathematical operations on integer and floating-point numbers by using the standard arithmetic operators shown here:

Figure 2.14: Arithmetic operators

Let's see how these operators are used. Follow these steps:

  1. Add the following code to add arithmetic operations to your playground:
let sum = 23 + 20
let result = 32 - sum
let total = result * 5
let divide = total / 10
  1. Click the Play/Stop...